Updated DataGrid (markdown)

DataGrid.md

@@ -12,6 +12,18 @@ See the [[Advanced DataGrid]] page for a list of differences between the Toolkit
 
 [[DataGrid_grid.jpg]]
 
+### Remarks
+
+When declaring the DataGrid in code behind, a default view must be set.
+
+For example:
+```
+dataGridControl.View = new Xceed.Wpf.DataGrid.Views.TableflowView();
+```
+
+Otherwise, depending on which version is being used, an exception can occur or the DataGridControl could be unusable at run-time.
+
+
 ### Usage
 
 **XAML**